iConvert Icons - iConvert converts and creates Windows, Mac and Linux icons in one step.
IcoFX - IcoFX is an all-in-one solution for icon creation, extraction and editing.
Faviconer.co - Create favicons from customizable text.
RealWorld Icon Editor - Create Windows icons and Mac OS icons from images and 3D models in an integrated icon maker.
Ordinatore - Those who want to tidy up their Macs will surely love this application.
IconsExtract - Extract icons and cursors stored in EXE, DLL, OCX, CPL files